Knife and scissor sharpener



Au 2o, 194s. J. MiLLER 2,406,094

KNIFE AND SGISSOR SHARPENER Filed May 1'7, 1945 TIM/Tiller INVENTOR! ATTD RN EYS Patented Aug. 20, 1946 KNIFE AND scrssoa SHARPENER Joseph M. Miller, Littleton, 0010., assignor to J. D. Cochran, Grass Lake, Mich.

Application May 17, 1945, Serial No. 594,187

My present invention has reference to a sharpening device of the type in which two pivotally supported discs are employed and which discs are designed to have drawn there-between the blade of a knife or scissors to be sharpened and the object of the invention is to simplify and materially improve this type of knife or scissors sharpening devices.

The invention, therefore, resides in the construction, combination and operative association of parts such as will hereinafter be definitely set forth in the following specification, specifically set forth in the claim and illustrated by the accompanying drawing.

In the drawing:

Fig. 1 is a plan view of the improvement.

Fig. 2 is an end view thereof.

Fig. 3 is a side view thereof, with a knife K in operative position, and

Fig. 4 is a plan view thereof, with a pair of scissors S in operative position.

The improvement contemplates the employment of a triangular metal base i which is designed to be fixed on a suitable support. The base, at one of its corners, is notched, as at 2, and the sides, adjacent the said notched corner are preferably integrally formed with upstanding sides or ears 3, respectively. The ears 3 are provided with parallel scissor guide portions 4 and 5 respectively, and the ends thereof are upwardly extended to form knife guide portions 6 and 1., respectively. There is pivotally secured on the inner faces of the ears, preferably by machine screws 8, the sharpening discs 9 and I0, respectively. It is to be noted that discs 9 and H] are not arranged in spaced parallel overlapping relation nor are the inner corners at the peripheries of the discs disposed in slight contacting engagement as is true for instance with respect to the patent to R. J. Dearborn, No. 1,069,768, but the periphery of the disc I0 is closely adjacent the inner face at the periphery of the disc 9.

The angular relation of the discs is the vital feature of my construction. By this arrangement the cutting edge of the knife cannot spring the discs apart which has been found true with respect to the Dearborn and also with respect to 1 Claim. (CI. 76-87) other devices wherein the cutting discs are not arranged at the same relative positions, as disclosed by my drawing. With my improvement it is impossible for the discs to spring apart, and, therefore, the discs positively act upon the cutting edge of the knife so that the cutting edge of th knife is effectively sharpened by drawing the same between the discs and as the discs are pivotally mounted the pressure of the knife between the said discs will cause only a slight turning of the said discs and such pressure also tends to force the discs toward each other and not to spread the discs, and, therefore, into tight binding and grinding action against the edge of the knife.

The base I and associated parts, with the exception of the steel discs are made from one piece and bent to form the device as illustrated.

The discs can be changed when worn, thus prolonging the life of the sharpener.

The scissors guides are shown off center of the discs to retain the proper bevel for the cutting edge, and the action is repeated for each blade of the scissors.

The space H between the knife guides 6 and I is shaped to conform with the shape of the knife blade.

The base I is provided with an opening [2, to permit the base to be fastened to a suitable support.

It is to be understood that my invention is susceptible of various changes in its form, proportions and minor details of construction, and I reserve the right to make such changes as properly fall within the scope of the appended claim.

Having described the invention, I claim:

A knife sharpener comprising a substantially triangular base having one of its corners notched and its sides, adjacent to the notch formed with upstanding ears aligned angular scissor guides formed integral with the upper edge of said ears, and spaced from each other at the ends thereof, upwardly extending knife guide portions extending upwardly from the ends of said guides and shaped on the inner sides thereof to conform to the shape of a knife to be sharpened thereby, a sharpening disc pivotally secured to each ear, and the periphery of one of the sharpening discs being in close proximity with'the face of the cooperating sharpening disc.

JOSEPH M. MILLER. 

